Local Rules Will Help Curb Crane Mishaps The article “New York City Official Blasts Federal Standards for Cranes” was interesting. One of the first crane accidents I remember was a crane “tip-over” in New York City in the early 1980s. A contractor was unloading materials from a delivery truck during the noon hour. The sidewalk was not blocked off, and the public was able to walk between the crane that was unloading the materials and the construction project on the other side of the sidewalk. The person operating the crane tipped the crane over, pinning a woman both under the
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.